EP2241480A1 - Front end of a motor vehicle with large size support brackets - Google Patents

Front end of a motor vehicle with large size support brackets Download PDF

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Publication number
EP2241480A1
EP2241480A1 EP10305242A EP10305242A EP2241480A1 EP 2241480 A1 EP2241480 A1 EP 2241480A1 EP 10305242 A EP10305242 A EP 10305242A EP 10305242 A EP10305242 A EP 10305242A EP 2241480 A1 EP2241480 A1 EP 2241480A1
Authority
EP
European Patent Office
Prior art keywords
front face
plate
face according
main
spar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10305242A
Other languages
German (de)
French (fr)
Other versions
EP2241480B1 (en
Inventor
Vincent Gonin
Laurent Droz-Bartholet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flex N Gate France SAS
Original Assignee
Faurecia Bloc Avant SAS
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Publication date
Application filed by Faurecia Bloc Avant SAS filed Critical Faurecia Bloc Avant SAS
Publication of EP2241480A1 publication Critical patent/EP2241480A1/en
Application granted granted Critical
Publication of EP2241480B1 publication Critical patent/EP2241480B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
    • B60R19/12—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement vertically spaced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • B60R2019/1866—Cellular structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R2019/264—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means using cellular structures

Definitions

  • the present invention generally relates to the structure of the front part of motor vehicles.
  • the invention relates, according to a first aspect, to a front face of a motor vehicle, of the type comprising two plates and two "average speed" shock absorbers fixed to the plates, each plate vertically having a height such that upper end parts and bottom of the plate are likely to be jointly located vertically at the front ends respectively of a main spar and a lower spar of the vehicle, the upper and lower end portions of the plate being capable of being jointly rigidly attached to said main spar and said lower spar.
  • a passenger vehicle has a higher recovery path, comprising the main beams of the vehicle.
  • These longitudinal members are strong section metal sections, which ensure the rigidity of the vehicle body. This high way of recovery of effort is often completed by a low way of recovery of effort, which includes the lower longitudinal members of the vehicle.
  • These lower rails are rigidly fixed to the engine cradle and extend forwardly therefrom. They are usually metallic, or more rarely plastic.
  • the vehicle frequently includes metal connections between the high and low tracks, so as to close the vehicle structure and provide rigidity.
  • These metal connections are called “pillars” or “pendants” or “hangers”. They are generally welded to the main and lower spars. They also make it possible to improve the vibratory acoustics of the vehicle.
  • FR-A-2 910 865 describes large platens whose forward facing surfaces serve as support for shock absorbers. These plates are not rigid enough to serve as a pillar and close the body structure.
  • the invention aims to provide a front face of a motor vehicle in which the closure of the vehicle structure and the support function of the shock absorbers are provided in a simple manner.
  • each plate comprises a plurality of internal cavities, each internal cavity being delimited perpendicularly to the vertical direction by a continuous peripheral wall and fully closed.
  • the invention relates to a motor vehicle comprising main spars, lower spars located under the main spars, and a front face having the above characteristics, the plates of the front face being each rigidly fixed to the main spars. one of the main spars and one of the lower spars.
  • the figure 1 represents the structure of the front of a motor vehicle.
  • This vehicle comprises two main longitudinal members 1, two lower longitudinal members 3 and a front face 5 rigidly fixed to both the main longitudinal members 1 and the lower longitudinal members 3.
  • Each main spar 1 comprises a substantially straight metal profile 7 and a flange 8 rigidly fixed to the profile 7.
  • the profile 7 extends substantially longitudinally.
  • the flange 8 is attached to a front end of the profile 7. It extends in a transverse vertical plane.
  • the lower longitudinal members 3 are located vertically substantially under the main longitudinal members 1. They comprise front end portions of substantially longitudinal orientation.
  • the lower longitudinal members 3 are integral, towards the rear, of the cradle for receiving the engine of the vehicle.
  • the plates 9 are each a piece of aluminum coming extrusion. They each have a constant section perpendicular to the vertical direction, represented on the figure 2 .
  • Each plate 9 has a central core of substantially vertical and transverse orientation, referenced 21, and two returns 23 extending rearwardly from the central core.
  • the returns 23 extend along two opposite vertical edges of the central core 21. Considered in horizontal section, the plate therefore has a U-shape open towards the rear of the vehicle.
  • the central core 21 has a vertical plane bearing surface 15 of the shock absorbers 11 forward.
  • the central core 21 has between the two returns 23 a bearing surface 27 of the main and lower spars. This surface 27 is vertical and transverse.
  • the two returns 23 extend over the entire height of the plate 9. They define between them a groove 29 for receiving the main spar 1 and the lower spar 3.
  • the plate 9 is of great height. The height is chosen so that an upper end portion of the plate 9 is located vertically at the corresponding main spar 1, and a lower end portion of the plate 9 is located vertically at the spar corresponding lower 3.
  • the main spar 1 is engaged in the groove 29, its flange 8 being supported and rigidly fixed to the surface 27 of the plate.
  • the lower spar 3 is engaged in the groove 29. Its front end is in abutment against the surface 27 and rigidly fixed thereto.
  • the returns 23 are arranged laterally on either side of the main spar 1, immediately along it.
  • the returns 23 are rigidly fixed to lateral sides 31 of the profile 7.
  • the flange 8 and the lateral sides 31 are respectively fixed to the central core and the return of the plate by any suitable means.
  • they are fixed by screws 32, or by a structural adhesive.
  • the screws 32 solidarisant the flange 8 to the central core 21 are of longitudinal orientation.
  • the screws 32 joining the returns 23 to the lateral sides 31 are of transverse orientation.
  • the screws 32 are symbolized by mixed lines on the Figures 2 to 4 .
  • the plates 9 are fixed in the same way on the lower longitudinal members 3.
  • each cavity 33 extends vertically over the entire height of the plate 9. Perpendicular to the vertical direction, each cavity 33 is delimited by a continuous and completely closed peripheral wall 35 . Thus, each cavity 33 is closed both forwardly, rearwardly and laterally to the right and left of the vehicle.
  • Cavities 33 are open upwards and / or downwards.
  • Cavities 33 considered in section perpendicular to the vertical direction, can have all kinds of shapes. They can thus have a square section, rectangular, round etc.
  • some of the cavities 33 are formed in the returns 23, and other cavities 33 are formed in the central core 21.
  • the cavities 33 formed in the central core 21 are of elongated rectangular section in the transverse direction.
  • Each return 23 has a cavity of square section, and a cavity of rectangular section elongate in the longitudinal direction.
  • the peripheral walls 35 of the cavities have a thickness of between 1 and 4 mm, preferably between 2 and 3 mm.
  • Each cavity considered in section perpendicular to the vertical direction, has a section between 400 and 1600 mm 2 , preferably between 600 and 1000 mm 2 .
  • the profile comprises a plurality of these cavities, the number of which is advantageously between 2 and 8 cavities (see diagrams). he It is envisaged that the cavities are arranged only on the lateral parts of the profile, which has the effect of refining the front part.
  • the thickness of the plate is between 12 and 35 mm, preferably between 15 and 25 mm.
  • its thickness may be between 3 and 10 mm, preferably between 4 and 6 mm.
  • the shock absorber 11 is provided for shocks of the "medium speed” type, that is to say for a shock of the vehicle at about 15 km / h against a rigid wall. These shocks generate an effort in the structure of the vehicle generally between 80 and 120 kN.
  • each shock absorber 11 comprises a block of a deformable material 37 and a plastic envelope 39 defining a housing inside which the block 37 is placed, as visible on the figure 3 .
  • Block 37 is made of a polymer foam, or an expanded polymer.
  • Said polymer may be polypropylene, polystyrene, polyurethane or any other suitable polymer.
  • the block may be made of a honeycomb material, consisting of a metal such as aluminum, or a polymer such as those mentioned above.
  • the block 37 can also be made of a metal foam, for example aluminum foam.
  • the block 37 has, considered in section perpendicular to the vertical direction, a trapezoidal shape, the large base of the trapezium being supported on the surface 25 of the plate. Block 37 extends vertically over most of the height of plate 9.
  • the envelope 39 has a prominent central portion 41, defining internally a housing of shape corresponding to that of the brick 37, and wherein the brick 37 is inserted. It also comprises a peripheral flange 43 secured to the protruding portion 41 and applied against the bearing surface 25 of the plate.
  • Such devices are similar to absorption ramps already described in the prior art, in particular by the Faurecia patent. FR0854027 .
  • the shock absorber further comprises means for fixing the shock absorber to the plate.
  • These means are for example screws solidarisant the flange 43 to the central core 21 of the plate. These screws may be the screws 32 solidarisant the plate 9 to the flange 8.
  • These fixing means may also be glue, the glue solidarisant the block 37 and / or the flange 43 of the envelope to the bearing surface 25 .
  • bearing surface 25 may be completely planar, or include raised or recessed areas (ribs, slides) intended to wedge in position the shock absorbers relative to the plate.
  • ribs or pins are formed on the plate and / or on the side members, so as to ensure a predetermined spacing between the respective surfaces of the side members and the plate to be glued. one over the other. This accurately controls the thickness of the adhesive layer for fixing the plate to the side members.
  • the bumper beam 13 is attached to the shock absorbers 11, the shock absorbers 11 being interposed between the beam 13 and the main beams 1.
  • the frame 14 is attached to the beam 13.
  • the frame 14 comprises two vertical uprights 45 extending under the beam 13, facing certain areas of the shock absorbers 11.
  • the uprights 45 are placed at the front shock absorbers 11.
  • the flange 8 has a shape substantially corresponding to the section of the profile 7.
  • the flange 8 fits exactly in the extension of the profile 7, and has no laterally projecting portion relative to the profile 7.
  • the surface 27 of the central core of the plate and the inner faces 46 of the returns 23 follow exactly the contour of the flange 8 and the lateral sides 31 of the main beams, with a small gap.
  • the flange is larger than the section of the profile 7.
  • the flange 8 has a peripheral edge 47 projecting from the profile 7.
  • the returns have two housings 48 opening towards the inside of the groove 29.
  • the projecting edge 47 is inserted into the housings 48.
  • the surface 27 of the core is always in the immediate vicinity of the front face of the flange 8.
  • the inner faces 46 of the returns remain in facing relation and in the immediate vicinity of the lateral sides 31 of the profiles 7.
  • the plate 9 comprises a fixing member 49 for a lashing ring.
  • the fixing member 49 is for example a cylindrical barrel embedded in the mass of the plate 9.
  • the cylindrical barrel 49 comprises a tapped central hole 51 of longitudinal orientation.
  • the central hole is open towards the front.
  • the shock absorber 11 has, facing the shaft 49, a longitudinal orientation chimney 53 placed in the extension of the shaft 49.
  • the chimney 53 passes right through the shock absorber and is open to its ends. two ends. It allows the introduction through the shock absorber of a threaded rod secured to the lashing ring, and the screwing of said threaded rod into the threaded hole 51.
  • the front face described above has many advantages.
  • each plate has a plurality of internal cavities, each internal cavity being delimited perpendicularly to the vertical direction by a continuous and completely closed peripheral wall, the plates are both rigid and particularly light. They can thus perform a dual function: to ensure the connection between the high and low paths of shock absorption of the vehicle, and to support the shock absorbers "medium speeds".
  • the plates thus replace the pillars used in vehicles of the state of the art to secure the high and low tracks and close the body structure.
  • the fact that the same structural element, namely the plate, provides the pillar function and the "average speed" shock absorber support function makes it possible to reduce the total mass of the front face of the vehicle, to simplify it. the structure, to limit the size of the front face, and to reduce the cost thereof.
  • the platen Because of its size, the platen has a particularly large "medium-speed" impact surface for the "medium-speed” shock absorber, and is therefore particularly suitable for large impact absorbers.
  • the plates are rigid enough to stabilize the vehicle structure when it is subjected to a medium speed shock, which generates a force in the vehicle structure between 80 and 120 kN.
  • the plate allows, for this type to maintain the main spar and the lower spar substantially in position relative to each other, and also to prevent buckling, spillage or deterioration of these spars.
  • the plates are also rigid enough to support medium-speed shock absorbers.
  • the plates can be made particularly conveniently by extrusion.
  • the plates are made of aluminum, they are at the same time light, rigid, and easy to make by extrusion.
  • the plate has a central core and two returns integral with the central core, contribute to increase the rigidity of the plate. In particular, this contributes to increasing the inertia of the plate in bending around the transverse axis.
  • the returns extend towards the rear of the vehicle from the central core, so as not to disturb the work of the shock absorbers.
  • connection between the longitudinal members and the plate is also made particularly rigid by the fact that the returns are also directly attached to the side members, in addition to the connection existing between the central core and the flange of the spar.
  • the front face described above can have multiple variants.
  • the number and shape of the internal cavities in the plate may be different from what is shown on the Figures 2 to 4 .
  • the plate may not have a return, and only include the central core pressed against the longitudinal members.
  • Platinum does not necessarily come from extrusion. It can be obtained by any other suitable technique, for example by molding, hydroforming etc. It is not necessarily aluminum, but can be made of any other suitable metal, for example magnesium.
  • the shock absorber does not necessarily include a block of trapezoidal section.
  • This block can have all kinds of sections: rectangular, square etc.
  • the invention also applies to front faces having architectures different from that of the figure 1 .
  • the front face may be of the type described in the French application filed under the number FR 0901440 and illustrated on the figure 5 .
  • the front face essentially comprises a structural frame 55 and a shield 57.
  • the structure of the shield 4 has not been entirely represented on the Fig. 1 .
  • the structural frame 55 contributes to the rigidity of the vehicle body. It comprises an upper crossmember 59, a lower crossmember 61, and upright uprights 63 and left 65.
  • the vertical right upright 63, the left vertical upright 65, of the structural frame consists of a plurality of deformable elements 67.
  • deformable elements 67 are superimposed in the vertical direction.
  • a vertical upright is constituted by a continuous deformable ramp.
  • An element or a deformable ramp is a substantially parallelepipedal structure capable of absorbing, by crashing along its thickness, a fraction of the energy of a shock.
  • the rear face of a vertical upright 63, 65 bears on most of the surface of a metal plate 9 of high height of the type described above connecting, on the same side of the vehicle, the ends of the side members main and lower.
  • the lower cross member 61 of the structural frame connects the two lowest absorption elements 67 of each of the uprights 63 and 65.
  • the lower cross member 61 has a section of generally rectangular shape.
  • the central portion of the lower cross member 8 is thinned in the vertical direction, so that its upper face has a housing for receiving a cooling assembly, indicated generally by the reference 69.
  • the cooling assembly 69 comprises by example a motor fan and a radiator.
  • the bottom rail 61 is advantageously made of plastic.
  • this crossbar may be metallic, and directly linked to the lower end of each extension cradle, so as to increase its participation in the cohesion and rigidity of the body, in a rolling situation or crash.
  • the upper cross member 59 of the structural frame connects the two deformable elements 67 the uppermost uprights right 63 and left 65.
  • the upper cross member 59 is generally arches.
  • the upper cross member 59 as a lattice girder, has an upper chord 71 and a lower chord 73 interconnected by reinforcing ribs 75.
  • the reinforcing ribs are arranged to form triangular inner caissons.
  • the upper chord 71 of the upper cross member is adapted to cooperate with a bodywork element of the vehicle and in particular with a cover thereof.
  • a medial portion of the upper cross member has a housing 77 for receiving cover closing means intended to cooperate with conjugate closure means provided on the cover.
  • Means for holding the cooling assembly are provided on the lower chord 73 of the upper cross member.
  • the shield 57 is disposed against the structural frame 55 towards the front thereof.
  • This shield 57 is for example a one-piece piece made of plastic material.
  • the shield 57 comprises an upper cross-member 79 and a lower cross-member 81 extending substantially horizontally and transversely and interconnected at each of their ends by a substantially vertical connecting beam 83.
  • the general shape of the shield is shaped to conform to the shape of a shield skin (not shown) and intended to be fixed on the front face of the shield.
  • the upper cross member 79 is disposed substantially at the right of the absorption elements 67 the highest of the amounts of the frame and extends between these elements 67.
  • the lower rail 81 is arranged substantially at the right of the lowest absorption elements 67 of the frame posts and extends between these elements 67.
  • the rear face 85 of the shield comprises receiving zones 87 of the uprights 63 and 65. These zones 87 constitute two large vertical rails and are disposed substantially behind the vertical connecting beams 83.
  • a central opening is provided between the cross members 79 and 81 and the connecting beams 83 so as to let air to the chassis of the motor vehicle.
  • the upper 79 and lower 81 and the 83 connecting beams comprise a plurality of ribs (not shown) extending in height and arranged to form cells extending between the front face and the rear face of the shield 57.
  • the front face may also be of the type described in the patent application filed under the number FR 09 01438 and represented on the figure 6 .
  • the front shown on the figure 6 comprises a support frame 91 schematically symbolized by a phantom rectangle carrying functional members of a vehicle powertrain cooling system and / or an air conditioning system, such as one or more radiators or a radiator. fan motor group.
  • the frame 91 is attached to the main spars 1 and wing spars supporting the wings of the body, and located above the main spars.
  • the frame 91 is set back towards the rear of the front ends of the main longitudinal members 1 and lower 3.
  • the front face also comprises a pair of fixing plates 9 arranged at the front ends of the lower longitudinal members 3.
  • Each plate 9 connects the front end of a main spar 1 to that of the adjacent lower spar 3 on the same side.
  • the plates 9 are high-rise plates, of the type described above with reference to the Figures 1 to 4 .
  • the front face also includes a bumper skin 93 and a shield 95.
  • the shield 95 is disposed between the skin 93, by which it is covered, and the plates 9. It has the function of absorbing the energy of shocks at low speed and medium-speed shocks (Danner) to preserve the chassis, and protect a pedestrian in case of pedestrian impact.
  • the shield 95 is disposed at the front ends of the main longitudinal members 1 and lower 3 being fixed in longitudinal support against the plates 9.
  • the shield 95 is disposed in front of the frame 91 so as to protect it, as well as the functional organs that it carries .
  • the shield 95 comprises a monobloc frame 97 formed of an upper bumper beam 99 located at the level of the main spars 1, a lower bumper beam 101 situated at the height of the lower spars 3 and two posts 103 connecting the beams. bumper 99, 101 between them.
  • the bumper beams 99 and 101 extend substantially transversely and horizontally. They are spaced vertically from each other.
  • the amounts 103 extend substantially vertically between the bumper beams 99,101.
  • the bumper beams 99, 101 have the function of channeling the energy of a shock to the uprights 103 in the event of a collision.
  • the lower bumper beam 101 or “pedestrian bumper beam”, also serves to protect the pedestrian leg in case of pedestrian impact.
  • the lower bumper beam 101 is arranged to impact the leg of a pedestrian below the knee, while the upper bumper beam 99 is provided to impact the leg of a pedestrian substantially to the right of the knee.
  • the upper bumper beam 99 is double and comprises at least two vertically spaced parallel horizontal ribs 105.
  • Each frame 105 has a U-section open horizontally rearwardly. The members 105 increase the inertia of the upper bumper beam in flexion and torsion.
  • each frame 105 comprises vertical longitudinal internal stiffening ribs.
  • the lower bumper beam 101 has a U-shaped section open horizontally rearwardly.
  • the lower bumper beam 101 includes internal stiffening ribs.
  • the amounts 103 of the shield 95 are intended to act as an energy absorber between the skin 93 and the plates 9, and to absorb the energy of a shock on the shield 95 at low speed or medium speed (Danner) .
  • the amounts 103 are able to be fixed directly in rigid support against the plates 9, without interposing additional shock absorbers reported between the uprights and the plates.
  • Each upright 103 has a honeycomb structure comprising cells 107, 109 extending longitudinally between a rear face and a front face of the uprights 103.
  • Each upright 103 comprises inverted blind cells comprising first blind cells 107, closed on the side of the rear face and open on the side of the front face, and second blind cells 109 open on the side of the rear face and closed on the side of the front face.
  • the first cells 107 and the second cells 109 are arranged staggered (or checkered).
  • Each amount 103 is fixed directly to the corresponding plate 9, in contact and rigid longitudinal support against the plate 9. Each amount 103 covers most of the support surface offered by the plate 9 corresponding.
  • Each amount 103 is fixed on the corresponding plate 9 by screwing or gluing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The face has average speed shock absorbers (11) fixed to plates (9). Upper and lower end parts of each plate are rigidly fixed to a main longeron and a lower longeron of a motor vehicle. The plate is provided with internal cavities (33), each defined perpendicular to vertical direction by a continuous and entirely closed peripheral wall (35). The internal cavity extends along height direction of the plate, and is opened toward top and/or bottom. An independent claim is also included for a motor vehicle comprising main longerons.

Description

La présente invention concerne en général la structure de la partie avant des véhicules automobiles.The present invention generally relates to the structure of the front part of motor vehicles.

Plus précisément, l'invention concerne selon un premier aspect une face avant de véhicule automobile, du type comprenant deux platines et deux absorbeurs de chocs "moyennes vitesses" fixés aux platines, chaque platine présentant verticalement une hauteur telle que des parties d'extrémités supérieure et inférieure de la platine sont susceptibles d'être conjointement situées verticalement au niveau d'extrémités avant respectivement d'un longeron principal et d'un longeron inférieur du véhicule, les parties d'extrémités supérieure et inférieure de la platine étant susceptibles d'être conjointement rigidement fixées audit longeron principal et audit longeron inférieur.More specifically, the invention relates, according to a first aspect, to a front face of a motor vehicle, of the type comprising two plates and two "average speed" shock absorbers fixed to the plates, each plate vertically having a height such that upper end parts and bottom of the plate are likely to be jointly located vertically at the front ends respectively of a main spar and a lower spar of the vehicle, the upper and lower end portions of the plate being capable of being jointly rigidly attached to said main spar and said lower spar.

Il est connu qu'un véhicule de tourisme présente une voie supérieure de reprise d'effort, comportant les longerons principaux du véhicule. Ces longerons sont des profilés métalliques de forte section, qui assurent la rigidité de la caisse du véhicule. Cette voie haute de reprise d'effort est souvent complétée par une voie basse de reprise d'effort, qui comprend les longerons inférieurs du véhicule. Ces longerons inférieurs sont rigidement fixés au berceau moteur et s'étendent vers l'avant à partir de celui-ci. Ils sont généralement métalliques, ou plus rarement plastiques.It is known that a passenger vehicle has a higher recovery path, comprising the main beams of the vehicle. These longitudinal members are strong section metal sections, which ensure the rigidity of the vehicle body. This high way of recovery of effort is often completed by a low way of recovery of effort, which includes the lower longitudinal members of the vehicle. These lower rails are rigidly fixed to the engine cradle and extend forwardly therefrom. They are usually metallic, or more rarely plastic.

De plus, le véhicule comprend fréquemment des liaisons métalliques entre les voies haute et basse, de manière à fermer la structure du véhicule et à apporter de la rigidité. Ces liaisons métalliques sont appelées "piliers" ou "pendeloques" ou encore "pendards". Elles sont généralement soudées aux longerons principaux et aux longerons inférieurs. Elles permettent par ailleurs d'améliorer l'acoustique vibratoire du véhicule.In addition, the vehicle frequently includes metal connections between the high and low tracks, so as to close the vehicle structure and provide rigidity. These metal connections are called "pillars" or "pendants" or "hangers". They are generally welded to the main and lower spars. They also make it possible to improve the vibratory acoustics of the vehicle.

Par ailleurs, FR-A-2 910 865 décrit des platines de grandes tailles dont les surfaces tournées vers l'avant servent d'appui à des absorbeurs de choc. Ces platines ne sont pas assez rigides pour servir de pilier et fermer la structure de caisse.Otherwise, FR-A-2 910 865 describes large platens whose forward facing surfaces serve as support for shock absorbers. These plates are not rigid enough to serve as a pillar and close the body structure.

Dans ce contexte, l'invention vise à proposer une face avant de véhicule automobile dans laquelle la fermeture de la structure du véhicule et la fonction de support des absorbeurs en chocs soient assurées de manière simple.In this context, the invention aims to provide a front face of a motor vehicle in which the closure of the vehicle structure and the support function of the shock absorbers are provided in a simple manner.

A cette fin, l'invention porte sur une face avant du type précité, caractérisée en ce que chaque platine comporte une pluralité de cavités internes, chaque cavité interne étant délimitée perpendiculairement à la direction verticale par une paroi périphérique continue et entièrement fermée.To this end, the invention relates to a front face of the aforementioned type, characterized in that each plate comprises a plurality of internal cavities, each internal cavity being delimited perpendicularly to the vertical direction by a continuous peripheral wall and fully closed.

La face avant peut également présenter une ou plusieurs des caractéristiques ci-dessous, considérées individuellement ou selon toutes les combinaisons techniquement possibles :

  • chaque cavité interne s'étend sur toute la hauteur de la platine ;
  • chaque cavité interne est ouverte vers le haut et/ou vers le bas ;
  • chaque platine est venue d'extrusion ;
  • chaque platine est en aluminium extrudé ;
  • chaque platine comporte une âme centrale et deux retours verticaux parallèles entre eux et solidaires de l'âme centrale, les deux retours délimitant entre eux une rainure de réception du longeron principal et du longeron inférieur s'étendant sur toute la hauteur de la platine ;
  • l'âme centrale présente à l'opposée des deux retours une surface d'appui des absorbeurs de chocs « moyennes vitesses », et entre les deux retours une surface d'appui du longeron principal et du longeron inférieur ;
  • certaines des cavités internes sont ménagées dans les retours ;
  • la face avant comprend des organes de fixation des retours directement aux longerons principaux.
The front panel may also have one or more of the following features, considered individually or in any technically feasible combination:
  • each internal cavity extends over the entire height of the plate;
  • each internal cavity is open upwards and / or downwards;
  • each platen came from extrusion;
  • each plate is made of extruded aluminum;
  • each plate comprises a central core and two vertical returns parallel to each other and integral with the central core, the two returns delimiting between them a receiving groove of the main spar and the lower spar extending over the entire height of the plate;
  • the central core has at the opposite of the two returns a bearing surface of the shock absorbers "medium speeds", and between the two returns a bearing surface of the main spar and the lower spar;
  • some of the internal cavities are formed in the returns;
  • the front face includes return fasteners directly to the main spars.

Selon un second aspect, l'invention porte sur un véhicule automobile comprenant des longerons principaux, des longerons inférieurs situés sous les longerons principaux, et une face avant présentant les caractéristiques ci-dessus, les platines de la face avant étant chacune rigidement fixée à l'un des longerons principaux et à l'un des longerons inférieurs.According to a second aspect, the invention relates to a motor vehicle comprising main spars, lower spars located under the main spars, and a front face having the above characteristics, the plates of the front face being each rigidly fixed to the main spars. one of the main spars and one of the lower spars.

D'autres caractéristiques et avantages de l'invention ressortiront de la description détaillée qui en est donnée ci-dessous, à titre indicatif et nullement limitatif, en référence aux figures annexées, parmi lesquelles :

  • la figure 1 est une vue en perspective, éclatée, de la structure avant d'un véhicule automobile comportant une face avant conforme à l'invention ;
  • la figure 2 est une vue en coupe horizontale d'une platine de la face avant de la figure 1, rapportée sur un longeron principal du véhicule ;
  • la figure 3 est une vue en coupe horizontale similaire à celle de la figure 2, pour un longeron principal présentant une bride proéminente, la figure montrant en outre un absorbeur de chocs "moyennes vitesses" rigidement fixé à la platine ; et
  • la figure 4 est une vue similaire à celle de la figure 3, pour une variante de réalisation dans laquelle la platine comporte une fixation pour un anneau d'arrimage ; et
  • les figures 5 et 6 illustrent des faces avant alternatives.
Other features and advantages of the invention will become apparent from the detailed description given below, for information only and in no way limitative, with reference to the appended figures, among which:
  • the figure 1 is an exploded perspective view of the front structure of a motor vehicle having a front face according to the invention;
  • the figure 2 is a horizontal sectional view of a plate of the front face of the figure 1 , attached to a main spar of the vehicle;
  • the figure 3 is a horizontal sectional view similar to that of the figure 2 for a main spar having a protruding flange, the figure further showing a "mid-speed" shock absorber rigidly attached to the platen; and
  • the figure 4 is a view similar to that of the figure 3 , for an alternative embodiment in which the plate comprises a fastening for a lashing ring; and
  • the figures 5 and 6 illustrate alternative front faces.

Dans la description qui va suivre, la gauche, la droite, l'avant, l'arrière, les directions longitudinale et transversale sont entendus relativement au sens de déplacement normal du véhicule.In the following description, the left, the right, the front, the rear, the longitudinal and transverse directions are heard relative to the direction of normal movement of the vehicle.

La figure 1 représente la structure de l'avant d'un véhicule automobile. Ce véhicule comporte deux longerons principaux 1, deux longerons inférieurs 3 et une face avant 5 rigidement fixée à la fois aux longerons principaux 1 et aux longerons inférieurs 3.The figure 1 represents the structure of the front of a motor vehicle. This vehicle comprises two main longitudinal members 1, two lower longitudinal members 3 and a front face 5 rigidly fixed to both the main longitudinal members 1 and the lower longitudinal members 3.

Chaque longeron principal 1 comporte un profilé métallique sensiblement rectiligne 7 et une bride 8 rigidement fixée au profilé 7. Le profilé 7 s'étend sensiblement longitudinalement. La bride 8 est fixée à une extrémité avant du profilé 7. Elle s'étend dans un plan vertical transversal.Each main spar 1 comprises a substantially straight metal profile 7 and a flange 8 rigidly fixed to the profile 7. The profile 7 extends substantially longitudinally. The flange 8 is attached to a front end of the profile 7. It extends in a transverse vertical plane.

Les longerons inférieurs 3 sont situés verticalement sensiblement sous les longerons principaux 1. Ils comportent des parties d'extrémité avant d'orientation sensiblement longitudinale. Les longerons inférieurs 3 sont solidaires, vers l'arrière, du berceau de réception du moteur du véhicule.The lower longitudinal members 3 are located vertically substantially under the main longitudinal members 1. They comprise front end portions of substantially longitudinal orientation. The lower longitudinal members 3 are integral, towards the rear, of the cradle for receiving the engine of the vehicle.

La face avant 5 comporte :

  • deux platines 9 destinées à être rapportées aux longerons 1 et 3 ;
  • deux absorbeurs de chocs "moyennes vitesses" 11 fixés aux platines 9 ;
  • une poutre de pare-choc 13 ;
  • un cadre 14 de réception d'un radiateur (non représenté) et d'autres équipements du véhicule tel qu'un groupe moto ventilateur (non représenté) ;
  • des bras 15 de support des projecteurs avant (non représentés) du véhicule, rigidement fixés à la poutre 13 ;
  • un absorbeur 17 prévu pour amortir les chocs piétons de type jambe, rigidement fixés le long d'une face frontale de la poutre 13 ; et
  • un absorbeur 19 prévu pour amortir les chocs piétons de type jambe, rigidement fixé à une traverse inférieure du cadre 14.
The front face 5 comprises:
  • two plates 9 to be reported to the longitudinal members 1 and 3;
  • two "average speed" shock absorbers 11 attached to the plates 9;
  • a bumper beam 13;
  • a frame 14 for receiving a radiator (not shown) and other equipment of the vehicle such as a motorcycle fan unit (not shown);
  • support arms 15 for front projectors (not shown) of the vehicle, rigidly fixed to the beam 13;
  • an absorber 17 provided for damping foot-type pedestrians, rigidly fixed along a front face of the beam 13; and
  • an absorber 19 provided for damping foot-type pedestrians, rigidly fixed to a lower cross member of the frame 14.

Les platines 9 sont chacune une pièce en aluminium venue d'extrusion. Elles présentent chacune une section constante perpendiculairement à la direction verticale, représentée sur la figure 2.The plates 9 are each a piece of aluminum coming extrusion. They each have a constant section perpendicular to the vertical direction, represented on the figure 2 .

Chaque platine 9 comporte une âme centrale d'orientation sensiblement verticale et transversale, référencée 21, et deux retours 23 s'étendant vers l'arrière à partir de l'âme centrale. Les retours 23 s'étendent le long de deux bords verticaux opposés de l'âme centrale 21. Considérée en section horizontale, la platine présente donc une forme de U ouvert vers l'arrière du véhicule.Each plate 9 has a central core of substantially vertical and transverse orientation, referenced 21, and two returns 23 extending rearwardly from the central core. The returns 23 extend along two opposite vertical edges of the central core 21. Considered in horizontal section, the plate therefore has a U-shape open towards the rear of the vehicle.

L'âme centrale 21 présente vers l'avant une surface 25 plane verticale d'appui des absorbeurs de choc 11.The central core 21 has a vertical plane bearing surface 15 of the shock absorbers 11 forward.

Vers l'arrière, l'âme centrale 21 présente entre les deux retours 23 une surface 27 d'appui des longerons principaux et inférieurs. Cette surface 27 est verticale et transversale.Towards the rear, the central core 21 has between the two returns 23 a bearing surface 27 of the main and lower spars. This surface 27 is vertical and transverse.

Les deux retours 23 s'étendent sur toute la hauteur de la platine 9. Ils définissent entre eux une rainure 29 de réception du longeron principal 1 et du longeron inférieur 3.The two returns 23 extend over the entire height of the plate 9. They define between them a groove 29 for receiving the main spar 1 and the lower spar 3.

La platine 9 est de grande hauteur. La hauteur est choisie de telle sorte qu'une partie d'extrémité supérieure de la platine 9 soit située verticalement au niveau du longeron principal 1 correspondant, et qu'une partie d'extrémité inférieure de la platine 9 soit située verticalement au niveau du longeron inférieur 3 correspondant.The plate 9 is of great height. The height is chosen so that an upper end portion of the plate 9 is located vertically at the corresponding main spar 1, and a lower end portion of the plate 9 is located vertically at the spar corresponding lower 3.

Le longeron principal 1 est engagé dans la rainure 29, sa bride 8 étant en appui et rigidement fixée à la surface 27 de la platine.The main spar 1 is engaged in the groove 29, its flange 8 being supported and rigidly fixed to the surface 27 of the plate.

De même, le longeron inférieur 3 est engagé dans la rainure 29. Son extrémité avant est en appui contre la surface 27 et rigidement fixée à celle-ci.Similarly, the lower spar 3 is engaged in the groove 29. Its front end is in abutment against the surface 27 and rigidly fixed thereto.

Comme le montre la figure 2, les retours 23 sont disposés latéralement de part et d'autre du longeron principal 1, immédiatement le long de celui-ci. Les retours 23 sont rigidement fixés à des côtés latéraux 31 du profilé 7.As shown in figure 2 , the returns 23 are arranged laterally on either side of the main spar 1, immediately along it. The returns 23 are rigidly fixed to lateral sides 31 of the profile 7.

La bride 8 et les côtés latéraux 31 sont fixés respectivement à l'âme centrale et au retour de la platine par tous moyens adaptés. Par exemple, ils sont fixés par des vis 32, ou par une colle structurelle. Les vis 32 solidarisant la bride 8 à l'âme centrale 21 sont d'orientation longitudinale. Les vis 32 solidarisant les retours 23 aux côtés latéraux 31 sont d'orientation transversale. Les vis 32 sont symbolisées par des traits mixtes sur les figures 2 à 4.The flange 8 and the lateral sides 31 are respectively fixed to the central core and the return of the plate by any suitable means. For example, they are fixed by screws 32, or by a structural adhesive. The screws 32 solidarisant the flange 8 to the central core 21 are of longitudinal orientation. The screws 32 joining the returns 23 to the lateral sides 31 are of transverse orientation. The screws 32 are symbolized by mixed lines on the Figures 2 to 4 .

Les platines 9 sont fixées de la même façon sur les longerons inférieurs 3.The plates 9 are fixed in the same way on the lower longitudinal members 3.

Des cavités internes 33 sont ménagées dans la masse de chaque platine 9. Chaque cavité 33 s'étend verticalement sur toute la hauteur de la platine 9. Perpendiculairement à la direction verticale, chaque cavité 33 est délimitée par une paroi périphérique 35 continue et entièrement fermée. Ainsi, chaque cavité 33 est fermée à la fois vers l'avant, vers l'arrière et latéralement vers la droite et la gauche du véhicule.Internal cavities 33 are formed in the mass of each plate 9. Each cavity 33 extends vertically over the entire height of the plate 9. Perpendicular to the vertical direction, each cavity 33 is delimited by a continuous and completely closed peripheral wall 35 . Thus, each cavity 33 is closed both forwardly, rearwardly and laterally to the right and left of the vehicle.

Les cavités 33 en revanche sont ouvertes vers le haut et/ou vers le bas.Cavities 33, on the other hand, are open upwards and / or downwards.

Les cavités 33, considérées en section perpendiculairement à la direction verticale, peuvent présenter toutes sortes de formes. Elles peuvent ainsi présenter une section carrée, rectangulaire, ronde etc.Cavities 33, considered in section perpendicular to the vertical direction, can have all kinds of shapes. They can thus have a square section, rectangular, round etc.

Dans tous les cas, certaines des cavités 33 sont ménagées dans les retours 23, et d'autres cavités 33 sont ménagées dans l'âme centrale 21.In all cases, some of the cavities 33 are formed in the returns 23, and other cavities 33 are formed in the central core 21.

Dans l'exemple de réalisation de la figure 2, les cavités 33 ménagées dans l'âme centrale 21 sont de section rectangulaire allongée suivant la direction transversale.In the exemplary embodiment of the figure 2 , the cavities 33 formed in the central core 21 are of elongated rectangular section in the transverse direction.

Chaque retour 23 présente une cavité de section carrée, et une cavité de section rectangulaire allongée suivant la direction longitudinale.Each return 23 has a cavity of square section, and a cavity of rectangular section elongate in the longitudinal direction.

Les parois périphériques 35 des cavités présentent une épaisseur comprise entre 1 et 4 mm, de préférence comprise entre 2 et 3 mm.The peripheral walls 35 of the cavities have a thickness of between 1 and 4 mm, preferably between 2 and 3 mm.

Chaque cavité, considérée en section perpendiculairement à la direction verticale, présente une section comprise entre 400 et 1600 mm2, de préférence comprise entre 600 et 1000 mm2. Le profil comporte une pluralité de ces cavités, dont le nombre est avantageusement compris entre 2 et 8 cavités (cf. schémas). Il est envisagé que les cavités soient disposées uniquement sur les parties latérales du profil, ce qui a pour effet d'affiner la partie frontale.Each cavity, considered in section perpendicular to the vertical direction, has a section between 400 and 1600 mm 2 , preferably between 600 and 1000 mm 2 . The profile comprises a plurality of these cavities, the number of which is advantageously between 2 and 8 cavities (see diagrams). he It is envisaged that the cavities are arranged only on the lateral parts of the profile, which has the effect of refining the front part.

L'épaisseur de la platine, considérée longitudinalement pour l'âme centrale 21 et transversalement pour les retours 23, est comprise entre 12 et 35 mm, de préférence entre 15 et 25 mm. Dans le cas ou la partie frontale est constituée d'une seule âme dépourvue de cavités, son épaisseur pourra être comprise entre 3 et 10 mm, de préférence entre 4 et 6 mm.The thickness of the plate, considered longitudinally for the central core 21 and transversely for the returns 23, is between 12 and 35 mm, preferably between 15 and 25 mm. In the case where the front portion consists of a single core devoid of cavities, its thickness may be between 3 and 10 mm, preferably between 4 and 6 mm.

L'absorbeur de chocs 11 est prévu pour les chocs de type « moyenne vitesse », c'est-à-dire pour un choc du véhicule à environ 15 km/h contre un mur rigide. Ces chocs génèrent un effort dans la structure du véhicule généralement compris entre 80 et 120 kN.The shock absorber 11 is provided for shocks of the "medium speed" type, that is to say for a shock of the vehicle at about 15 km / h against a rigid wall. These shocks generate an effort in the structure of the vehicle generally between 80 and 120 kN.

Dans un exemple de réalisation, chaque absorbeur de choc 11 comporte un bloc d'un matériau déformable 37 et une enveloppe en matière plastique 39 définissant un logement à l'intérieur duquel le bloc 37 est placé, comme visible sur la figure 3.In an exemplary embodiment, each shock absorber 11 comprises a block of a deformable material 37 and a plastic envelope 39 defining a housing inside which the block 37 is placed, as visible on the figure 3 .

Le bloc 37 est réalisé en une mousse de polymère, ou en un polymère expansé. Ledit polymère peut être du polypropylène, du polystyrène, du polyuréthane ou tout autre polymère adapté. Alternativement, le bloc peut être réalisé en un matériau en nid d'abeilles, constitué d'un métal tel que l'aluminium, ou d'un polymère tel que ceux mentionnés ci-dessus. Le bloc 37 peut encore être réalisé en une mousse métallique, par exemple en mousse d'aluminium. Le bloc 37 présente, considéré en coupe perpendiculairement à la direction verticale, une forme trapézoïdale, la grande base du trapèze étant en appui sur la surface 25 de la platine. Le bloc 37 s'étend, verticalement, sur la plus grande partie de la hauteur de la platine 9.Block 37 is made of a polymer foam, or an expanded polymer. Said polymer may be polypropylene, polystyrene, polyurethane or any other suitable polymer. Alternatively, the block may be made of a honeycomb material, consisting of a metal such as aluminum, or a polymer such as those mentioned above. The block 37 can also be made of a metal foam, for example aluminum foam. The block 37 has, considered in section perpendicular to the vertical direction, a trapezoidal shape, the large base of the trapezium being supported on the surface 25 of the plate. Block 37 extends vertically over most of the height of plate 9.

L'enveloppe 39 comporte une partie centrale proéminente 41, définissant intérieurement un logement de forme correspondante à celle de la brique 37, et dans lequel la brique 37 est insérée. Elle comporte également une collerette périphérique 43, solidaire de la partie proéminente 41 et appliquée contre la surface d'appui 25 de la platine.The envelope 39 has a prominent central portion 41, defining internally a housing of shape corresponding to that of the brick 37, and wherein the brick 37 is inserted. It also comprises a peripheral flange 43 secured to the protruding portion 41 and applied against the bearing surface 25 of the plate.

De tels dispositifs s'apparentent à des rampes d'absorption déjà décrites dans l'art antérieur, notamment par le brevet Faurecia FR0854027 .Such devices are similar to absorption ramps already described in the prior art, in particular by the Faurecia patent. FR0854027 .

L'absorbeur de chocs comporte par ailleurs des moyens de fixation de l'absorbeur de chocs à la platine. Ces moyens sont par exemple des vis solidarisant la collerette 43 à l'âme centrale 21 de la platine. Ces vis peuvent être les vis 32 solidarisant la platine 9 à la bride 8. Ces moyens de fixation peuvent également être de la colle, la colle solidarisant le bloc 37 et/ou la collerette 43 de l'enveloppe à la surface d'appui 25.The shock absorber further comprises means for fixing the shock absorber to the plate. These means are for example screws solidarisant the flange 43 to the central core 21 of the plate. These screws may be the screws 32 solidarisant the plate 9 to the flange 8. These fixing means may also be glue, the glue solidarisant the block 37 and / or the flange 43 of the envelope to the bearing surface 25 .

Il est à noter que la surface d'appui 25 peut être intégralement plane, ou comporter des zones en relief ou en creux (nervures, glissières) destinées à caler en position les absorbeurs de chocs par rapport à la platine.It should be noted that the bearing surface 25 may be completely planar, or include raised or recessed areas (ribs, slides) intended to wedge in position the shock absorbers relative to the plate.

Dans le cas où la platine 9 est fixée par collage aux longerons, des nervures ou des pions sont formés sur la platine et/ou sur les longerons, de manière à garantir un écartement prédéterminé entre les surfaces respectives des longerons et de la platine à coller l'une sur l'autre. On contrôle ainsi de manière précise l'épaisseur de la couche de colle assurant la fixation de la platine aux longerons.In the case where the plate 9 is fixed by gluing to the side members, ribs or pins are formed on the plate and / or on the side members, so as to ensure a predetermined spacing between the respective surfaces of the side members and the plate to be glued. one over the other. This accurately controls the thickness of the adhesive layer for fixing the plate to the side members.

La poutre de pare-chocs 13 est fixée aux absorbeurs de chocs 11, les absorbeurs de chocs 11 étant interposés entre la poutre 13 et les longerons principaux 1.The bumper beam 13 is attached to the shock absorbers 11, the shock absorbers 11 being interposed between the beam 13 and the main beams 1.

Le cadre 14 est rapporté sur la poutre 13. Le cadre 14 comporte deux montants verticaux 45 s'étendant sous la poutre 13, en vis-à-vis de certaines zones des absorbeurs de chocs 11. Les montants 45 sont placés à l'avant des absorbeurs de chocs 11.The frame 14 is attached to the beam 13. The frame 14 comprises two vertical uprights 45 extending under the beam 13, facing certain areas of the shock absorbers 11. The uprights 45 are placed at the front shock absorbers 11.

Dans la variante de réalisation représentée sur la figure 2, la bride 8 présente une forme correspondant sensiblement à la section du profilé 7. Dans ce cas, la bride 8 s'inscrit exactement dans le prolongement du profilé 7, et ne comporte pas de partie en saillie latéralement par rapport au profilé 7. La surface 27 de l'âme centrale de la platine et les faces internes 46 des retours 23 suivent exactement le contour de la bride 8 et des côtés latéraux 31 des longerons principaux, avec un faible écartement.In the variant embodiment represented on the figure 2 , the flange 8 has a shape substantially corresponding to the section of the profile 7. In this case, the flange 8 fits exactly in the extension of the profile 7, and has no laterally projecting portion relative to the profile 7. The surface 27 of the central core of the plate and the inner faces 46 of the returns 23 follow exactly the contour of the flange 8 and the lateral sides 31 of the main beams, with a small gap.

Dans la variante de réalisation représentée sur la figure 3, la bride est plus grande que la section du profilé 7. Ainsi, la bride 8 présente un bord périphérique 47 en saillie par rapport au profilé 7. Dans ce cas, les retours présentent deux logements 48 s'ouvrant vers l'intérieur de la rainure 29. Le bord en saillie 47 est inséré dans les logements 48. La surface 27 de l'âme est toujours à proximité immédiate de la face avant de la bride 8. Les faces internes 46 des retours restent en vis-à-vis et à proximité immédiate des côtés latéraux 31 des profilés 7.In the variant embodiment represented on the figure 3 , the flange is larger than the section of the profile 7. Thus, the flange 8 has a peripheral edge 47 projecting from the profile 7. In this case, the returns have two housings 48 opening towards the inside of the groove 29. The projecting edge 47 is inserted into the housings 48. The surface 27 of the core is always in the immediate vicinity of the front face of the flange 8. The inner faces 46 of the returns remain in facing relation and in the immediate vicinity of the lateral sides 31 of the profiles 7.

Dans une autre variante de réalisation représentée sur la figure 4, la platine 9 comporte un organe de fixation 49 pour un anneau d'arrimage. L'organe de fixation 49 est par exemple un fût cylindrique noyé dans la masse de la platine 9. Le fût cylindrique 49 comporte un trou central taraudé 51 d'orientation longitudinale. Le trou central est ouvert vers l'avant. Dans ce cas, l'absorbeur de choc 11 présente en regard du fût 49 une cheminée 53 d'orientation longitudinale, placée dans le prolongement du fût 49. La cheminée 53 traverse de part en part l'absorbeur de chocs et est ouverte à ses deux extrémités. Elle permet l'introduction à travers l'absorbeur de chocs d'une tige filetée solidaire de l'anneau d'arrimage, et le vissage de ladite tige filetée dans le trou taraudé 51.In another variant embodiment shown on the figure 4 , the plate 9 comprises a fixing member 49 for a lashing ring. The fixing member 49 is for example a cylindrical barrel embedded in the mass of the plate 9. The cylindrical barrel 49 comprises a tapped central hole 51 of longitudinal orientation. The central hole is open towards the front. In this case, the shock absorber 11 has, facing the shaft 49, a longitudinal orientation chimney 53 placed in the extension of the shaft 49. The chimney 53 passes right through the shock absorber and is open to its ends. two ends. It allows the introduction through the shock absorber of a threaded rod secured to the lashing ring, and the screwing of said threaded rod into the threaded hole 51.

La face avant décrite ci-dessus présente de multiples avantages.The front face described above has many advantages.

Du fait que chaque platine comporte une pluralité de cavités internes, chaque cavité interne étant délimitée perpendiculairement à la direction verticale par une paroi périphérique continue et entièrement fermée, les platines sont à la fois rigides et particulièrement légères. Elles peuvent ainsi assurer une double fonction : assurer la liaison entre les voies hautes et basses d'absorption de chocs du véhicule, et supporter les absorbeurs de chocs « moyennes vitesses ». Les platines remplacent ainsi les piliers utilisés dans les véhicules de l'état de la technique pour solidariser les voies hautes et basses et fermer la structure de caisse. Le fait que le même élément de structure, à savoir la platine, assure la fonction de pilier et la fonction de support d'absorbeur de chocs « moyennes vitesses » permet de réduire la masse totale de la face avant du véhicule, d'en simplifier la structure, de limiter l'encombrement de la face avant, et de diminuer le coût de celle-ci.Because each plate has a plurality of internal cavities, each internal cavity being delimited perpendicularly to the vertical direction by a continuous and completely closed peripheral wall, the plates are both rigid and particularly light. They can thus perform a dual function: to ensure the connection between the high and low paths of shock absorption of the vehicle, and to support the shock absorbers "medium speeds". The plates thus replace the pillars used in vehicles of the state of the art to secure the high and low tracks and close the body structure. The fact that the same structural element, namely the plate, provides the pillar function and the "average speed" shock absorber support function makes it possible to reduce the total mass of the front face of the vehicle, to simplify it. the structure, to limit the size of the front face, and to reduce the cost thereof.

Du fait de sa taille, la platine présente une surface d'appui pour l'absorbeur de chocs « moyennes vitesses » particulièrement grande, et est donc particulièrement adaptée aux absorbeurs de chocs de grande dimension. Les platines sont suffisamment rigides pour stabiliser la structure du véhicule lorsque celui-ci est soumis à un choc moyenne vitesse, qui génère un effort dans la structure du véhicule compris entre 80 et 120 kN. La platine permet, pour ce type de choc, de maintenir le longeron principal et le longeron inférieur sensiblement en position l'un par rapport à l'autre, et également d'empêcher le flambement, le déversement ou la détérioration de ces longerons.Because of its size, the platen has a particularly large "medium-speed" impact surface for the "medium-speed" shock absorber, and is therefore particularly suitable for large impact absorbers. The plates are rigid enough to stabilize the vehicle structure when it is subjected to a medium speed shock, which generates a force in the vehicle structure between 80 and 120 kN. The plate allows, for this type to maintain the main spar and the lower spar substantially in position relative to each other, and also to prevent buckling, spillage or deterioration of these spars.

Les platines sont également suffisamment rigides pour servir de support aux absorbeurs de chocs à moyenne vitesse.The plates are also rigid enough to support medium-speed shock absorbers.

Les platines peuvent être réalisées de manière particulièrement commode par extrusion. Quand les platines sont réalisées en aluminium, elles sont à la fois légères, rigides, et faciles à réaliser par extrusion.The plates can be made particularly conveniently by extrusion. When the plates are made of aluminum, they are at the same time light, rigid, and easy to make by extrusion.

Le fait que la platine comporte une âme centrale et deux retours solidaires de l'âme centrale, contribuent à augmenter la rigidité de la platine. En particulier, ceci contribue à augmenter l'inertie de la platine en flexion autour de l'axe transversal.The fact that the plate has a central core and two returns integral with the central core, contribute to increase the rigidity of the plate. In particular, this contributes to increasing the inertia of the plate in bending around the transverse axis.

De préférence, les retours s'étendent vers l'arrière du véhicule à partir de l'âme centrale, de manière à ne pas perturber le travail des absorbeurs de chocs. Ceci permet de conférer à la platine une forme de U ouvert vers l'arrière du véhicule, et ainsi de définir une rainure de réception du longeron principal et du longeron inférieur permettant de créer une liaison particulièrement rigide entre les longerons et la platine. Le fait que les retours comportent des cavités internes permet de rendre ceux-ci particulièrement rigides.Preferably, the returns extend towards the rear of the vehicle from the central core, so as not to disturb the work of the shock absorbers. This makes it possible to give the plate a U-shape open toward the rear of the vehicle, and thus to define a receiving groove of the main spar and the lower spar for creating a particularly rigid connection between the spars and the plate. The fact that the returns have internal cavities makes them particularly rigid.

La liaison entre les longerons et la platine est rendue également particulièrement rigide par le fait que les retours sont eux aussi fixés directement aux longerons, en plus de la liaison existant entre l'âme centrale et la bride du longeron.The connection between the longitudinal members and the plate is also made particularly rigid by the fact that the returns are also directly attached to the side members, in addition to the connection existing between the central core and the flange of the spar.

La face avant décrite ci-dessus peut présenter de multiples variantes.The front face described above can have multiple variants.

Le nombre et la forme des cavités internes ménagées dans la platine peut être différent de ce qui est représenté sur les figures 2 à 4.The number and shape of the internal cavities in the plate may be different from what is shown on the Figures 2 to 4 .

Dans une variante de réalisation non préférée, la platine peut ne pas comporter de retour, et comporter seulement l'âme centrale plaquée contre la les longerons.In a non preferred embodiment, the plate may not have a return, and only include the central core pressed against the longitudinal members.

La platine n'est pas nécessairement venue d'extrusion. Elle peut être obtenue par toute autre technique adaptée, par exemple par moulage, par hydroformage etc. Elle n'est pas nécessairement en aluminium, mais peut être réalisée en tout autre métal adapté, par exemple en magnésium.Platinum does not necessarily come from extrusion. It can be obtained by any other suitable technique, for example by molding, hydroforming etc. It is not necessarily aluminum, but can be made of any other suitable metal, for example magnesium.

L'absorbeur de chocs ne comporte par nécessairement un bloc de section trapézoïdale. Ce bloc peut présenter toutes sortes de sections : rectangulaire, carrée etc.The shock absorber does not necessarily include a block of trapezoidal section. This block can have all kinds of sections: rectangular, square etc.

L'invention s'applique également à des faces avant ayant des architectures différentes de celle de la figure 1.The invention also applies to front faces having architectures different from that of the figure 1 .

Par exemple, la face avant peut être du type décrit dans la demande française déposée sous le numéro FR 0901440 et illustré sur la figure 5.For example, the front face may be of the type described in the French application filed under the number FR 0901440 and illustrated on the figure 5 .

La face avant comprend essentiellement un cadre structurel 55 et un bouclier 57. Pour des raisons de simplicité, la structure du bouclier 4 n'a pas été entièrement représentée sur la Fig. 1.The front face essentially comprises a structural frame 55 and a shield 57. For the sake of simplicity, the structure of the shield 4 has not been entirely represented on the Fig. 1 .

Le cadre structurel 55 participe à la rigidité de la caisse du véhicule. Il comprend une traverse supérieure 59, une traverse inférieure 61, et des montants verticaux droit 63 et gauche 65.The structural frame 55 contributes to the rigidity of the vehicle body. It comprises an upper crossmember 59, a lower crossmember 61, and upright uprights 63 and left 65.

Le montant vertical droit 63, respectivement le montant vertical gauche 65, du cadre structurel est constitué par une pluralité d'éléments déformables 67. Dans le mode de réalisation envisagé, quatre éléments déformables 67 sont superposés selon la direction verticale. Dans une variante de réalisation, un montant vertical est constitué par une rampe déformable continue. Un élément ou une rampe déformable est une structure sensiblement parallélépipédique apte à absorber, en s'écrasant selon son épaisseur, une fraction de l'énergie d'un choc.The vertical right upright 63, the left vertical upright 65, of the structural frame consists of a plurality of deformable elements 67. In the embodiment envisaged, four deformable elements 67 are superimposed in the vertical direction. In an alternative embodiment, a vertical upright is constituted by a continuous deformable ramp. An element or a deformable ramp is a substantially parallelepipedal structure capable of absorbing, by crashing along its thickness, a fraction of the energy of a shock.

La face arrière d'un montant vertical 63, 65 vient en appui sur l'essentiel de la surface d'une platine métallique 9 de grande hauteur du type décrit ci-dessus reliant, d'un même côté du véhicule, les extrémités des longerons principal et inférieur.The rear face of a vertical upright 63, 65 bears on most of the surface of a metal plate 9 of high height of the type described above connecting, on the same side of the vehicle, the ends of the side members main and lower.

La traverse inférieure 61 du cadre structurel relie les deux éléments d'absorption 67 les plus bas de chacun des montants verticaux 63 et 65. La traverse inférieure 61 a une section de forme générale rectangulaire. La portion centrale de la traverse inférieure 8 est amincie selon la direction verticale, de sorte que sa face supérieure présente un logement de réception d'un ensemble de refroidissement, indiqué de manière générale par la référence 69. L'ensemble de refroidissement 69 comporte par exemple un groupe motoventilateur et un radiateur. La traverse inférieure 61 est avantageusement réalisée en matière plastique. En variante, cette traverse peut être métallique, et liée directement à l'extrémité inférieure de chacune des prolonges de berceau, de manière à accroître sa participation à la cohésion et à la rigidité de la caisse, en situation de roulage ou de crash.The lower cross member 61 of the structural frame connects the two lowest absorption elements 67 of each of the uprights 63 and 65. The lower cross member 61 has a section of generally rectangular shape. The central portion of the lower cross member 8 is thinned in the vertical direction, so that its upper face has a housing for receiving a cooling assembly, indicated generally by the reference 69. The cooling assembly 69 comprises by example a motor fan and a radiator. The bottom rail 61 is advantageously made of plastic. Alternatively, this crossbar may be metallic, and directly linked to the lower end of each extension cradle, so as to increase its participation in the cohesion and rigidity of the body, in a rolling situation or crash.

La traverse supérieure 59 du cadre structurel relie les deux éléments déformables 67 les plus hauts des montants verticaux droit 63 et gauche 65. La traverse supérieure 59 est de forme générale en arche. La traverse supérieure 59, en tant que poutre à treillis, comporte une membrure supérieure 71 et une membrure inférieure 73 reliées entre elles par des nervures de renfort 75. Les nervures de renfort sont disposées de manière à former des caissons intérieurs triangulaires.The upper cross member 59 of the structural frame connects the two deformable elements 67 the uppermost uprights right 63 and left 65. The upper cross member 59 is generally arches. The upper cross member 59, as a lattice girder, has an upper chord 71 and a lower chord 73 interconnected by reinforcing ribs 75. The reinforcing ribs are arranged to form triangular inner caissons.

La membrure supérieure 71 de la traverse supérieure est adaptée pour coopérer avec un élément de carrosserie du véhicule et en particulier avec un capot de celui-ci.The upper chord 71 of the upper cross member is adapted to cooperate with a bodywork element of the vehicle and in particular with a cover thereof.

Une portion médiane de la traverse supérieure présente un logement 77 de réception de moyens de fermeture du capot destinés à coopérer avec des moyens de fermeture conjugués prévus sur le capot.A medial portion of the upper cross member has a housing 77 for receiving cover closing means intended to cooperate with conjugate closure means provided on the cover.

Des moyens de maintien de l'ensemble de refroidissement sont prévus sur la membrure inférieure 73 de la traverse supérieure.Means for holding the cooling assembly are provided on the lower chord 73 of the upper cross member.

Le bouclier 57 est disposé contre le cadre structurel 55 vers l'avant de celui-ci. Ce bouclier 57 est par exemple une pièce monobloc réalisée en matière plastique. Le bouclier 57 comprend une traverse supérieure 79 et une traverse inférieure 81 s'étendant sensiblement horizontalement et transversalement et reliées entre elles à chacune de leurs extrémités par une poutre de liaison sensiblement verticale 83.The shield 57 is disposed against the structural frame 55 towards the front thereof. This shield 57 is for example a one-piece piece made of plastic material. The shield 57 comprises an upper cross-member 79 and a lower cross-member 81 extending substantially horizontally and transversely and interconnected at each of their ends by a substantially vertical connecting beam 83.

La forme générale du bouclier est conformée pour épouser la forme d'une peau de bouclier (non représentée) et destinée à être fixée sur la face avant du bouclier.The general shape of the shield is shaped to conform to the shape of a shield skin (not shown) and intended to be fixed on the front face of the shield.

La traverse supérieure 79 est disposée sensiblement au droit des éléments d'absorption 67 les plus haut des montants du cadre et s'étend entre ces éléments 67.The upper cross member 79 is disposed substantially at the right of the absorption elements 67 the highest of the amounts of the frame and extends between these elements 67.

La traverse inférieure 81 est disposée sensiblement au droit des éléments d'absorption 67 les plus bas des montants du cadre et s'étend entre ces éléments 67.The lower rail 81 is arranged substantially at the right of the lowest absorption elements 67 of the frame posts and extends between these elements 67.

La face arrière 85 du bouclier comprend des zones 87 de réception des montants 63 et 65. Ces zones 87 constituent deux larges rails verticaux et sont disposées sensiblement derrière les poutres de liaison verticales 83.The rear face 85 of the shield comprises receiving zones 87 of the uprights 63 and 65. These zones 87 constitute two large vertical rails and are disposed substantially behind the vertical connecting beams 83.

Une ouverture centrale est prévue entre les traverses 79 et 81 et les poutres de liaison 83 de sorte à laisser passer l'air vers le châssis du véhicule automobile.A central opening is provided between the cross members 79 and 81 and the connecting beams 83 so as to let air to the chassis of the motor vehicle.

Les traverses supérieures 79 et inférieures 81, et les poutres de liaison 83, comprennent une pluralité de nervures (non représentées) s'étendant en hauteur et agencées pour former des alvéoles s'étendant entre la face avant et la face arrière du bouclier 57.The upper 79 and lower 81 and the 83 connecting beams comprise a plurality of ribs (not shown) extending in height and arranged to form cells extending between the front face and the rear face of the shield 57.

La face avant peut également être du type décrit dans la demande de brevet déposée sous le numéro FR 09 01438 et représentée sur la figure 6.The front face may also be of the type described in the patent application filed under the number FR 09 01438 and represented on the figure 6 .

La face avant représentée sur la figure 6 comprend un cadre de support 91 symbolisé de façon schématique par un rectangle en traits mixtes portant des organes fonctionnels d'un système de refroidissement du groupe motopropulseur du véhicule et/ou d'un système de climatisation, tel qu'un ou plusieurs radiateurs ou un groupe motoventilateur.The front shown on the figure 6 comprises a support frame 91 schematically symbolized by a phantom rectangle carrying functional members of a vehicle powertrain cooling system and / or an air conditioning system, such as one or more radiators or a radiator. fan motor group.

Le cadre 91 est fixé aux longerons principaux 1 et à des longerons d'aile supportant les ailes de la carrosserie, et situés au-dessus des longerons principaux.The frame 91 is attached to the main spars 1 and wing spars supporting the wings of the body, and located above the main spars.

Le cadre 91 se situe en retrait vers l'arrière des extrémités avant des longerons principaux 1 et inférieurs 3.The frame 91 is set back towards the rear of the front ends of the main longitudinal members 1 and lower 3.

La face avant comprend également une paire de platines 9 de fixation disposées aux extrémités avant des longerons inférieurs 3. Chaque platine 9 relie l'extrémité avant d'un longeron principal 1 à celle du longeron inférieur 3 adjacent situé du même côté.The front face also comprises a pair of fixing plates 9 arranged at the front ends of the lower longitudinal members 3. Each plate 9 connects the front end of a main spar 1 to that of the adjacent lower spar 3 on the same side.

Les platines 9 sont des platines de grande hauteur, du type décrit plus haut en référence aux figures 1 à 4.The plates 9 are high-rise plates, of the type described above with reference to the Figures 1 to 4 .

La face avant comporte également une peau de pare-chocs 93 et un bouclier 95.The front face also includes a bumper skin 93 and a shield 95.

Le bouclier 95 est disposé entre la peau 93, par laquelle il est recouvert, et les platines 9. Il a pour fonction d'absorber l'énergie de chocs à petite vitesse et de chocs à moyenne vitesse (Danner) de façon à préserver le châssis, et de protéger un piéton en cas de choc piéton.The shield 95 is disposed between the skin 93, by which it is covered, and the plates 9. It has the function of absorbing the energy of shocks at low speed and medium-speed shocks (Danner) to preserve the chassis, and protect a pedestrian in case of pedestrian impact.

Le bouclier 95 est disposé aux extrémités avant des longerons principaux 1 et inférieurs 3 en étant fixé en appui longitudinal contre les platines 9. Le bouclier 95 est disposé devant le cadre 91 de façon à le protéger, ainsi que les organes fonctionnels qu'il porte.The shield 95 is disposed at the front ends of the main longitudinal members 1 and lower 3 being fixed in longitudinal support against the plates 9. The shield 95 is disposed in front of the frame 91 so as to protect it, as well as the functional organs that it carries .

Le bouclier 95 comprend un cadre 97 monobloc formé d'une poutre pare-chocs supérieure 99 située à hauteur des longerons principaux 1, d'une poutre pare-chocs inférieure 101 située à hauteur des longerons inférieurs 3 et de deux montants 103 reliant les poutres pare-chocs 99, 101 entre elles.The shield 95 comprises a monobloc frame 97 formed of an upper bumper beam 99 located at the level of the main spars 1, a lower bumper beam 101 situated at the height of the lower spars 3 and two posts 103 connecting the beams. bumper 99, 101 between them.

Les poutres pare-chocs 99 et 101 s'étendent sensiblement transversalement et horizontalement. Elles sont espacées verticalement l'une de l'autre. Les montants 103 s'étendent sensiblement verticalement entre les poutres pare-chocs 99,101.The bumper beams 99 and 101 extend substantially transversely and horizontally. They are spaced vertically from each other. The amounts 103 extend substantially vertically between the bumper beams 99,101.

Les poutres pare-chocs 99, 101 ont pour fonction de canaliser l'énergie d'un choc vers les montants 103 en cas de collision. La poutre pare-chocs inférieure 101, ou « poutre pare-chocs piéton », a également pour fonction de protéger la jambe de piéton en cas de choc piéton.The bumper beams 99, 101 have the function of channeling the energy of a shock to the uprights 103 in the event of a collision. The lower bumper beam 101, or "pedestrian bumper beam", also serves to protect the pedestrian leg in case of pedestrian impact.

La poutre pare-chocs inférieure 101 est disposée pour venir impacter la jambe d'un piéton en dessous du genou, tandis que la poutre pare-chocs supérieure 99 est prévue pour venir impacter la jambe d'un piéton sensiblement au droit du genou.The lower bumper beam 101 is arranged to impact the leg of a pedestrian below the knee, while the upper bumper beam 99 is provided to impact the leg of a pedestrian substantially to the right of the knee.

Dans cet exemple, la poutre pare-chocs supérieure 99 est double et comprend au moins deux membrures 105 horizontales parallèles espacées verticalement. Chaque membrure 105 possède une section en U ouverte horizontalement vers l'arrière. Les membrures 105 augmentent l'inertie de la poutre pare-chocs supérieure en flexion et en torsion.In this example, the upper bumper beam 99 is double and comprises at least two vertically spaced parallel horizontal ribs 105. Each frame 105 has a U-section open horizontally rearwardly. The members 105 increase the inertia of the upper bumper beam in flexion and torsion.

En option, chaque membrure 105 comprend des nervures verticales longitudinales intérieures de rigidification.Optionally, each frame 105 comprises vertical longitudinal internal stiffening ribs.

La poutre pare-chocs inférieure 101 possède une section en U ouverte horizontalement vers l'arrière.The lower bumper beam 101 has a U-shaped section open horizontally rearwardly.

En option, la poutre pare-chocs inférieure 101 comprend des nervures intérieures de rigidification.Optionally, the lower bumper beam 101 includes internal stiffening ribs.

Les montants 103 du bouclier 95 sont prévus pour faire office d'absorbeur d'énergie entre la peau 93 et les platines 9, et pour absorber l'énergie d'un choc sur le bouclier 95 à petite vitesse ou à moyenne vitesse (Danner).The amounts 103 of the shield 95 are intended to act as an energy absorber between the skin 93 and the plates 9, and to absorb the energy of a shock on the shield 95 at low speed or medium speed (Danner) .

Ainsi, les montants 103 sont aptes à être fixés directement en appui rigide contre les platines 9, sans interposer des absorbeurs de choc additionnels rapportés entre les montants et les platines.Thus, the amounts 103 are able to be fixed directly in rigid support against the plates 9, without interposing additional shock absorbers reported between the uprights and the plates.

Chaque montant 103 présente une structure alvéolaire comprenant des alvéoles 107, 109 s'étendant longitudinalement entre une face arrière et une face avant des montants 103.Each upright 103 has a honeycomb structure comprising cells 107, 109 extending longitudinally between a rear face and a front face of the uprights 103.

Chaque montant 103 comprend des alvéoles borgnes inversées comprenant des premières alvéoles 107 borgnes, fermées du côté de la face arrière et ouvertes du côté de la face avant, et des deuxièmes alvéoles 109 borgnes ouvertes du côté de la face arrière et fermées du côté de la face avant. Les premières alvéoles 107 et les deuxièmes alvéoles 109 sont disposées en quinconce (ou damier).Each upright 103 comprises inverted blind cells comprising first blind cells 107, closed on the side of the rear face and open on the side of the front face, and second blind cells 109 open on the side of the rear face and closed on the side of the front face. The first cells 107 and the second cells 109 are arranged staggered (or checkered).

Chaque montant 103 est fixé directement sur la platine 9 correspondante, en contact et en appui longitudinal rigide contre sur la platine 9. Chaque montant 103 recouvre la majeure partie de la surface d'appui offerte par la platine 9 correspondante.Each amount 103 is fixed directly to the corresponding plate 9, in contact and rigid longitudinal support against the plate 9. Each amount 103 covers most of the support surface offered by the plate 9 corresponding.

Chaque montant 103 est fixé sur la platine 9 correspondante par vissage ou par collage.Each amount 103 is fixed on the corresponding plate 9 by screwing or gluing.

Claims (15)

Face avant de véhicule automobile, la face avant (5) comprenant deux platines (9) et deux absorbeurs de chocs « moyennes vitesses » (11) fixés aux platines (9), chaque platine (9) présentant verticalement une hauteur telle que des parties d'extrémité supérieure et inférieure de la platine (9) sont susceptibles d'être conjointement situées verticalement au niveau d'extrémités avant respectivement d'un longeron principal (1) et d'un longeron inférieur (3) du véhicule, les parties d'extrémité supérieure et inférieure de la platine (9) étant susceptibles d'être conjointement rigidement fixées audit longeron principal (1) et audit longeron inférieur (3), caractérisée en ce que chaque platine (9) comporte une pluralité de cavités internes (33), chaque cavité interne (33) étant délimitée perpendiculairement à la direction verticale par une paroi périphérique (35) continue et entièrement fermée.Front side of a motor vehicle, the front face (5) comprising two plates (9) and two shock absorbers "medium speeds" (11) attached to the plates (9), each plate (9) vertically having a height such that parts upper and lower end of the plate (9) are likely to be jointly located vertically at the front ends respectively of a main spar (1) and a lower spar (3) of the vehicle, parts d upper and lower end of the plate (9) being capable of being jointly rigidly fixed to said main spar (1) and to said lower spar (3), characterized in that each plate (9) comprises a plurality of internal cavities (33). ), each inner cavity (33) being delimited perpendicularly to the vertical direction by a continuous and completely closed peripheral wall (35). Face avant selon la revendication 1, caractérisée en ce que chaque cavité interne (33) s'étend sur toute la hauteur de la platine (9).Front face according to claim 1, characterized in that each internal cavity (33) extends over the entire height of the plate (9). Face avant selon la revendication 2, caractérisée en ce que chaque cavité interne (33) est ouverte vers le haut et/ou vers le bas.Front face according to claim 2, characterized in that each internal cavity (33) is open upwards and / or downwards. Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque platine (9) est venue d'extrusion.Front face according to any one of the preceding claims, characterized in that each plate (9) is extrusion. Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque platine (9) est en aluminium extrudé.Front face according to any one of the preceding claims, characterized in that each plate (9) is made of extruded aluminum. Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque platine (9) comporte une âme centrale (21) et deux retours (23) verticaux parallèles entre eux et solidaires de l'âme centrale (21), les deux retours (23) délimitant entre eux une rainure (29) de réception du longeron principal (1) et du longeron inférieur (3) s'étendant sur toute la hauteur de la platine (9).Front face according to any one of the preceding claims, characterized in that each plate (9) comprises a central core (21) and two return (23) vertical parallel to each other and integral with the central core (21), both returns (23) delimiting between them a groove (29) for receiving the main spar (1) and the lower spar (3) extending over the entire height of the plate (9). Face avant selon la revendication 6, caractérisée en ce que l'âme centrale (21) présente à l'opposé des deux retours (23) une surface d'appui (25) des absorbeurs de chocs « moyennes vitesses » (11), et entre les deux retours (23) une surface d'appui (27) du longeron principal (1) et du longeron inférieur (3).Front face according to claim 6, characterized in that the central core (21) has opposite the two returns (23) a bearing surface (25) of the shock absorbers "average speeds" (11), and between the two returns (23) a bearing surface (27) of the main spar (1) and the lower spar (3). Face avant selon la revendication 6 ou 7, caractérisée en ce que certaines des cavités internes (33) sont ménagées dans les retours (23).Front face according to claim 6 or 7, characterized in that some of the internal cavities (33) are formed in the returns (23). Face avant selon l'une quelconque des revendications 6 à 8, caractérisée en ce qu'elle comprend des organes de fixation des retours (23) directement aux longerons principaux (1).Front face according to any one of claims 6 to 8, characterized in that it comprises return fixing members (23) directly to the main beams (1). Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque platine (9) présente vers l'avant une surface (25) d'appui de l'absorbeur de chocs (11) correspondant.Front face according to any one of the preceding claims, characterized in that each plate (9) has forwards a surface (25) for bearing the corresponding shock absorber (11). Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque cavité interne (33) considérée en section perpendiculairement à la direction verticale, présente une section comprise entre 400 et 1600 mm2.Front face according to any one of the preceding claims, characterized in that each internal cavity (33) considered in section perpendicular to the vertical direction, has a section between 400 and 1600 mm2. Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque platine (9) présente une épaisseur comprise entre 12 et 35 mm.Front face according to any one of the preceding claims, characterized in that each plate (9) has a thickness of between 12 and 35 mm. Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque absorbeur de chocs (11) est adapté pour amortir un choc générant un effort compris entre 80 et 120 kN dans la structure du véhicule.Front face according to any one of the preceding claims, characterized in that each shock absorber (11) is adapted to damp a shock generating a force of between 80 and 120 kN in the vehicle structure. Face avant selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend une poutre de pare-chocs (13), les absorbeurs de chocs (11) étant interposés entre la poutre de pare-chocs (13) et les platines (9).Front face according to any one of the preceding claims, characterized in that it comprises a bumper beam (13), the shock absorbers (11) being interposed between the bumper beam (13) and the plates (9). Véhicule automobile comprenant des longerons principaux (1), des longerons inférieurs (3) situés sous les longerons principaux (1), et une face avant (5) selon l'une quelconque des revendications précédentes, les platines (9) de la face avant (5) étant chacune rigidement fixée à l'un des longerons principaux (1) et à l'un des longerons inférieurs (3).Motor vehicle comprising main spars (1), lower spars (3) located under the main spars (1), and a front face (5) according to any one of the preceding claims, the plates (9) of the front face (5) being each rigidly fixed to one of the main beams (1) and to one of the lower longitudinal members (3).
EP20100305242 2009-04-17 2010-03-12 Front end of a motor vehicle with large size support brackets Not-in-force EP2241480B1 (en)

Applications Claiming Priority (1)

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FR0952535A FR2944498B1 (en) 2009-04-17 2009-04-17 FRONT PANEL OF MOTOR VEHICLE WITH LARGE SIZE SUPPORT PLATES FOR SHOCK ABSORBERS, AND VEHICLE THEREFOR.

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EP2241480A1 true EP2241480A1 (en) 2010-10-20
EP2241480B1 EP2241480B1 (en) 2013-05-08

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FR2895341A1 (en) * 2005-12-23 2007-06-29 Plastic Omnium Cie ENERGY ABSORPTION SYSTEM FOR A MOTOR VEHICLE
FR2910865A1 (en) 2006-12-28 2008-07-04 Plastic Omnium Cie Shock-absorbing system supporting element for motor vehicle, has shock absorbers and support surface that is arranged in manner to extend surface under plate and is not irreversibly distorted when vehicle is subjected to shock assurance
EP1942033A1 (en) * 2006-12-28 2008-07-09 Compagnie Plastic Omnium Support part for a shock-absorber system designed to be mounted on one end of a longitudinal beam for a vehicle

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2477617A (en) * 2010-02-05 2011-08-10 Gm Global Tech Operations Inc Bumper arrangement for a motor vehicle having an energy absorber connected at two points
US8439412B2 (en) 2010-02-05 2013-05-14 GM Global Technology Operations LLC Motor vehicle forward structure
EP2384938A1 (en) * 2010-05-05 2011-11-09 Faurecia Bloc Avant Back end element and back end for a vehicle
FR2959707A1 (en) * 2010-05-05 2011-11-11 Faurecia Bloc Avant REAR FACE AND REAR FACE ELEMENT FOR MOTOR VEHICLE
US8585130B2 (en) 2010-05-05 2013-11-19 Faurecia Bloc Avant Rear-end element and rear end for motor vehicle
US8801084B2 (en) 2010-05-05 2014-08-12 Faurecia Bloc Avant Rear-end element and rear end for motor vehicle
GB2521361A (en) * 2013-12-17 2015-06-24 Gordon Murray Design Ltd Vehicle and chassis therefor
CN105813924A (en) * 2013-12-17 2016-07-27 戈登·默里设计有限公司 Vehicle and chassis therefor
CN105813924B (en) * 2013-12-17 2019-07-23 戈登·默里设计有限公司 Vehicle and its chassis
GB2521361B (en) * 2013-12-17 2020-03-25 Gordon Murray Design Ltd Vehicle and chassis therefor
WO2016012661A1 (en) * 2014-07-24 2016-01-28 Renault Low area device for motor vehicle
EP3213965A1 (en) * 2016-03-03 2017-09-06 Flex-N-Gate France Bumper assembly with shock-absorber and associated motor vehicle
CN113859364A (en) * 2021-11-17 2021-12-31 浙江吉利控股集团有限公司 Electric automobile

Also Published As

Publication number Publication date
FR2944498A1 (en) 2010-10-22
FR2944498B1 (en) 2012-12-28
EP2241480B1 (en) 2013-05-08
ES2417331T3 (en) 2013-08-07

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